46" 3 pnt tiller maintenance question???

[tozlakes]

I just bought a used 3 point tiller that is orange and has the Kubota sticker but no ID tag or numbers that I can see. I notice that there is lube points for all of the universals and I filled the upper gearbox to slightly over half full as most GB. My problem is the side of the unit with a plug. It looks to be a chain drive but I need to know does it take oil at this point and is it filled to the plug level or some other means of lubrication. Thanks in advance for the info. John